I play EB nowadays with the BI exe. mod, it makes the computer a lot more aggressive navally. But some factions are pretty aggressive over time, recently in a game playing as Sweboz, the Romans besieged the Arverni in two cities at the same time with two large armies, and conquered both in the same turn, vanquishing the Arverni. Hellas often sees someone dying, often Epeiros or Makedonia, I have seen the Getai expanding effectively into Skythia and beating the Sarmatians back, other games sometimes the Ptolemaio or Seleukids start spamming elite phalanxes and destroying one faction after another. I have also seen the Lusotannan conquer most of Iberia and push into Gaul and vanquish the Arverni. So yeah you might mod the exe. file to improve the AI aggressions.